00300nam a2200109Ia 450000500170000000800410001708200150005810000170007324500610009026000310015130000080018220260224040919.0260224s9999||||xx |||||||||||||| ||und||  a551.48 HEI  aHeinonen, P. 0aHydrological and limnological aspects of lake monitoring  aChichester : Wiley, c2000  a372